Editor’s note: The MLS is in crisis, say many large brokers, agents and industry observers. The cooperative organization plays an essential role in the U.S. housing market, matching buyers and sellers through the assistance of a Realtor. But cooperation has been replaced by acrimony, litigation and an uneasy migration to the Internet. In this three-part series, we look at some underlying problems causing concern for MLS members, what’s working and what’s not working.